2024 年 2 巻 論文ID: 120
We have studied an antenna system using a smart reconfigurable sub-reflector for a high-resolution radio astronomy mission for a balloon-borne Very Long Baseline Interferometry (VLBI) mission. The antenna system consists of the camera image sensor system to capture the surface shape degradation of the primary reflector, the smart sub-reflector system to install the actuators and the displacement magnifying mechanisms to compensate for the optical path length error to recover the required antenna gain. The original strategy to achieve the stringent requirements was to adopt a high-precision image measurement method, which requires much more computation time. However, the strategy sacrifices the antenna operation time as the most important task. In order to deal with the contradictory situation, this study considers a resilient operation planning of the smart antenna system under multiple uncertainties. The system-theoretic process analysis (STPA) is adopted to re-model the smart antenna system from the resilient operation point of view. Then, the resilient operation model considering several uncertain factors as hazards is investigated.
